/*
 * The MIT License
 *
 * Copyright (c) 2011 Takahiro Hashimoto
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package jp.a840.websocket.frame.rfc6455;

import jp.a840.websocket.frame.rfc6455.enums.Opcode;

import java.io.UnsupportedEncodingException;

/**
 * The Class TextFrame.
 *
 * @author Takahiro Hashimoto
 */
public class TextFrame extends FrameRfc6455 {

    /**
     * The converted string.
     */
    private String convertedString;

    /**
     * Instantiates a new text frame.
     *
     * @param header   the header
     * @param bodyData the contents data
     */
    public TextFrame(FrameHeaderRfc6455 header, byte[] bodyData) {
        super(header, bodyData);
    }

    /**
     * Instantiates a new text frame.
     *
     * @param str the str
     */
    public TextFrame(String str) {
        super();
        byte[] body = convertStringToByteArray(str);
        setHeader(FrameBuilderRfc6455.createFrameHeader(body, false, Opcode.TEXT_FRAME));
        setContents(body);
    }

    /**
     * Convert string to byte array.
     *
     * @param str the str
     * @return the byte[]
     */
    private static byte[] convertStringToByteArray(String str) {
        try {
            return str.getBytes("UTF-8");
        } catch (UnsupportedEncodingException e) {
            // ignore
        }
        return null;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    public String toString() {
        if (convertedString == null) {
            try {
                convertedString = new String(contents, "UTF-8");
            } catch (UnsupportedEncodingException e) {
                convertedString = "";
            }
        }
        return convertedString;
    }
}
